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GPS Systems
Christy Patrick GPS, or Global Positioning System, is exactly what the name implies: a global positioning system. GPS systems use radio waves and satellites to determine global location. Since 1994, a constellation consisting of twenty-four global positioning satellites has been in place in space. Each satellite circles the Earth twice on its own orbit, which is about twelve thousand miles from Earth. Using basic science, these satellites are used to find a specific location on Earth. The Science Behind GPS Without getting too scientific, the easiest way to conceptualize how GPS works is by the formula you learned back in high school: velocity times time equals distance (VT=D). The satellites orbiting around earth send out radio waves. These radio waves travel at approximately the speed of light, and thus, the speed of light is the velocity for the equation. [AD] [REF="gps systems2"]Continued...[/REF] :FALSE |
